HOT-DIPPING Zn+5% Al + (0.01%-0.2%) RE alloy on steel surface by the gas reductionmethod is a new technology. Owing to its good anti-corrosive and forming properties as wellas good technical periormances, the coating attracts wide interest and has been put into indus-trial production rapidly. The authors successfully produced the coating by the electrolytic ac-tivity aid agent method and put it into industrial production. The products have been used inthe electric power and railway engineerings. Results show that the anti-corrosive properties HOT-DIPPING Zn + 5% Al + (0.01% -0.2%) RE alloy on steel surface by the gas reduction method is a new technology. Owing to its good anti-corrosive and forming properties as wellas good technical periormances, the coating attracts wide The authors successfully produced the coating by the electrolytic ac-tivity aid agent method and put it into industrial production. The products have been used inthe electric power and railway engineerings. Results show that the anti-corrosive properties